PPT-1 Congestion Control

Transport Layer 3 2 Principles of Congestion Control Congestion informally too many sources sending too much data too fast for network to handle different from flow control manifestations. IETF. . 88, Vancouver, BC. Lyle . Bertz. (. lyle.t.bertz@sprint.com. ). Brent Hirschman (. brent.hirschman@sprint.com. ). Supplement to . draft-bertz-dime-congestion-flow-attributes-01. RFC. 5777 Foundation. Harald. . R. ä. cke. 1. Graph .  . Tree. .  . Approximation. Tree Approximation. Approximating a Graph by a Tree. Task:. Given an (undirected) graph G. . Compute a . decomposition tree . that is . Julia Chuzhoy. Toyota Technological Institute at Chicago. Routing Problems. Input. : Graph G, source-sink pairs (s. 1. ,t. 1. ),…,(. s. k. ,t. k. ).. Goal. : Route as many pairs as possible; minimize edge congestion.. Ihsan Ayyub Qazi. Background: Congestion Control. What is congestion?. A network state where the arrival rate exceeds the service rate. Throughput starts decreasing (due to packet losses). Delay increases fast (queues build up). Computer Networks. Principles of Congestion Control. Congestion:. informally: “too many sources sending too much data too fast for the . network. to handle”. different from flow control!. manifestations:. Control. . (part II). EE 122, Fall 2013. Sylvia Ratnasamy. http://inst.eecs.berkeley.edu/~ee122. /. Material thanks to Ion . Stoica. , Scott . Shenker. , Jennifer Rexford, Nick . McKeown. , and many other colleagues. Celio. Albuquerque, Brett J. Vickers, Tatsuya . Suda. 1. Outline. The Problem. Existing Solutions. Network Border Patrol. Feedback Control Algorithm. Rate Control Algorithm. Simulations and Testing. By. Bhavani manthena. What is Congestion?. Congestion . is a situation in Communication Networks in which too many packets are present in a part of the subnet, performance degrades. .. . Congestion in a network may occur when the load on the . A dynamic tolling system as a part of a proposed cordon based congestion pricing scheme for the Athens, Greece road network has been considered to be a possible management measure to mitigate the negative impacts of traffic congestion. . Murari Sridharan. muraris@microsoft.com. CONEX BOF, IETF 76, Hiroshima. Its all about the apps . Apps have diverse needs. P2P, VoIP, TV, online apps, games. Filling the pipe while being TCP fair. High-speed congestion control, Autotuning the receive window, host OS (including app) bottlenecks. By. Bhavani manthena. What is Congestion?. Congestion . is a situation in Communication Networks in which too many packets are present in a part of the subnet, performance degrades. .. . Congestion in a network may occur when the load on the . Jian He. UT Austin. 1. Why is Congestion Control necessary?. Data . Packets. ACK. Congested . Link. Congested link vs. reliability: . long queuing delay, packet loss. But, can delay or packet loss always . udp. Congestion control. Congestion occurs when machines send too many packets to a network too quickly from the transport layer. . Performance will become degraded as packets are dropped and lost.. Ashkan Paya . 1. Based on. An argument for increasing TCP’s initial congestion window. Nandita Dukkipati, Tiziana Refice, Yuchung Cheng, Jerry Chu, Tom Herbert, Amit Agarwal, Arvind Jain and Natalia Sutin. Google Inc..